Release Rapid Diffs on merge request creation page

This issue is focused on releasing Rapid Diffs on the merge request creation page.

Current blockers

display: table
fields: title, labels("backend", "frontend"), weight, milestone, assignee, labels("workflow::*")
limit: 50
query: project = "gitlab-org/gitlab" AND label = "Rapid Diffs:New MR Form"  AND state = opened